The Power of Information

National Drinking Water Database


Baltimore City Department of Public Works Utilities - Baltimore, MD


Serves 1,600,000 people

Total haloacetic acids (HAAs)

Total haloacetic acids refers to the sum of the concentrations of five related disinfection byproducts in a water sample: dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid.
 
This Drinking Water System
Test Days Exceeding Health GuidelinesDefinition of what this is
105 days
Test Days Exceeding Legal LimitsNumber of days in which the samples taken in that day exceed the Maximum Contaminant Level (Depending on the contaminant and its MCL, that may or may not trigger an MCL violation. Some MCLs are based on averages spanning several months to a year)
8 days
Test DaysNumber of days in which this chemical has reported results in the data we received from the State
105 days
Tests ConductedNumber of individual tests done for this contaminant
439 tests

Testing Summary

ContaminantAverage/
Maximum
Result
Health Limit
Exceeded
Legal Limit
Exceeded

Testing History

-Tested      -Detected      -Over Health Guidelines      -Over Legal Limit*
Total haloacetic acids (HAAs)Total haloacetic acids refers to the sum of the concentrations of five related disinfection byproducts in a water sample: dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid.42.1 ppb
88.25 ppb
Yes
0.7 ppb
Yes
60 ppb
NOTE: Each dot in the above graph represents one month.
* Water utilities are noted as exceeding the legal limit if any test is above the maximum contaminant level (MCL). Most MCLs are based on annual averages so exceeding the MCL for one test does not necessarily indicate that the system is out of compliance.

Health Based and Legal Limits for Total haloacetic acids (HAAs)

Health Based Limits for Total haloacetic acids (HAAs)

StandardDescriptionLevel
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.0.7 ppb
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.60 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.70 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.70 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.450 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5200 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.5200 ppb

Testing Results

Testing DateAverage
Result
Samples taken that dayNumber of Non-DetectsRange of Results
2007-11-1933.33 ppb6011 to 44 ppb
2007-11-1853 ppb1053 ppb
2007-11-1632.5 ppb6011 to 43 ppb
2007-11-1435.33 ppb6027 to 45 ppb
2007-09-1930.5 ppb2020 to 41 ppb
2007-09-1835.5 ppb2030 to 41 ppb
2007-09-1734 ppb3030 to 37 ppb
2007-09-1432.45 ppb11012 to 51 ppb
2007-07-1940.83 ppb6013 to 62 ppb
2007-07-1832.5 ppb2027 to 38 ppb
2007-07-1727 ppb2026 to 28 ppb
2007-07-1641 ppb6028 to 51 ppb
2007-05-1651 ppb3050 to 52 ppb
2007-05-1530 ppb2014 to 46 ppb
2007-05-1446.5 ppb6028 to 58 ppb
2007-05-1151.83 ppb6042 to 60 ppb
2007-03-2153.67 ppb3042 to 67 ppb
2007-03-2051.5 ppb2045 to 58 ppb
2007-03-1945.4 ppb5011 to 66 ppb
2007-03-1643.2 ppb5024 to 57 ppb
2007-02-0246 ppb1046 ppb
2007-01-2438 ppb2034 to 42 ppb
2007-01-2334.5 ppb2031 to 38 ppb
2007-01-2233 ppb6027 to 42 ppb
2007-01-1941.4 ppb5035 to 47 ppb
2006-11-2237 ppb1037 ppb
2006-11-2141.33 ppb3038 to 47 ppb
2006-11-2044.33 ppb602 to 69 ppb
2006-11-1743 ppb6037 to 50 ppb
2006-09-2045.33 ppb3030 to 58 ppb
2006-09-1953.5 ppb2047 to 60 ppb
2006-09-1833.83 ppb603 to 51 ppb
2006-09-1543.17 ppb6016 to 76 ppb
2006-08-1660.5 ppb2050 to 71 ppb
2006-08-1539.5 ppb2035 to 44 ppb
2006-08-1460 ppb6030 to 92 ppb
2006-08-1162.4 ppb5042 to 106 ppb
2006-07-1954.67 ppb3040 to 68 ppb
2006-07-1844.5 ppb2031 to 58 ppb
2006-07-1440 ppb1040 ppb
2006-05-1748 ppb3044 to 50 ppb
2006-05-1632.67 ppb3015 to 47 ppb
2006-05-1540.5 ppb6034 to 48 ppb
2006-05-1234.2 ppb502 to 50 ppb
2006-03-2244.5 ppb2030 to 59 ppb
2006-03-2125.5 ppb2020 to 31 ppb
2006-03-2023.83 ppb6010 to 32 ppb
2006-03-1753.6 ppb5042 to 61 ppb
2006-03-1252 ppb1052 ppb
2006-01-2344.83 ppb6036 to 52 ppb
2006-01-2038.83 ppb6028 to 46 ppb
2006-01-1834 ppb4031 to 37 ppb
2006-01-1756.5 ppb2042 to 71 ppb
2005-11-1639.33 ppb3036 to 46 ppb
2005-11-1537.5 ppb2036 to 39 ppb
2005-11-1435.4 ppb5026 to 49 ppb
2005-11-1137.75 ppb8031 to 47 ppb
2005-09-2133 ppb4020 to 46 ppb
2005-09-2038.5 ppb2036 to 41 ppb
2005-09-1934.33 ppb6028 to 46 ppb
2005-09-1639.17 ppb6028 to 57 ppb
2005-07-2088.25 ppb4065 to 112 ppb
2005-07-1980 ppb2067 to 93 ppb
2005-07-1870.5 ppb6063 to 79 ppb
2005-07-1575.8 ppb5037 to 104 ppb
2005-06-2442 ppb5019 to 69 ppb
2005-06-2231.6 ppb5023 to 40 ppb
2005-06-2130 ppb2028 to 32 ppb
2005-06-2035.67 ppb3028 to 49 ppb
2005-05-1843.87 ppb3028.9 to 62.5 ppb
2005-05-1746.6 ppb2041.9 to 51.3 ppb
2005-05-1639.37 ppb6026.3 to 47.3 ppb
2005-05-1343.74 ppb7031.14 to 56.63 ppb
2005-03-2329.33 ppb6021 to 49 ppb
2005-03-2230.29 ppb7014 to 42 ppb
2005-03-2128.8 ppb5024 to 40 ppb
2005-02-2836 ppb4031 to 48 ppb
2005-02-2535.38 ppb8028 to 52 ppb
2005-02-2324.75 ppb402 to 36 ppb
2005-02-2230 ppb3026 to 33 ppb
2004-11-1847 ppb1047 ppb
2004-11-1744.2 ppb509 to 92 ppb
2004-11-1639 ppb704 to 83 ppb
2004-11-1538.83 ppb601 to 56 ppb
2004-09-2248.67 ppb3046 to 51 ppb
2004-09-2142 ppb2040 to 44 ppb
2004-09-2022.5 ppb6010 to 36 ppb
2004-09-1716.5 ppb807 to 31 ppb
2004-07-2166.25 ppb4049 to 77 ppb
2004-07-2045.5 ppb2030 to 61 ppb
2004-07-1951.8 ppb5041 to 60 ppb
2004-07-1624.14 ppb707 to 34 ppb
2004-07-0941 ppb1041 ppb
2004-05-1940.67 ppb3032 to 48 ppb
2004-05-1858 ppb3054 to 65 ppb
2004-05-1760.6 ppb5046 to 76 ppb
2004-05-1449.25 ppb8038 to 65 ppb
2004-03-2443.25 ppb4034 to 55 ppb
2004-03-2349.5 ppb2046 to 53 ppb
2004-03-2245.75 ppb4029 to 57 ppb
2004-03-1947.22 ppb9027 to 77 ppb
2004-01-2836.33 ppb3033 to 40 ppb
2004-01-2736.67 ppb3032 to 44 ppb
2004-01-2632.75 ppb4031 to 36 ppb
2004-01-2330.2 ppb502 to 49 ppb